<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        body{
            min-width: 100vw;
            min-height: 100vh;
            background: linear-gradient(
            135deg,
            red 0%,
            orange 18%,
            yellow 36%,
            green 55%,
            blue 73%,
            indigo 81%,
            purple 100%)
        }
    </style>
</head>
<body>
    
</body>
</html>